Processing system and processing method for blocked microreactor

Abstract

A processing system and processing method for blocked microreactor. The processing system comprises an gas intake device, a flushing device, a microreactor to be processed and a plasma processing device. One end of the microreactor to be processed is connected with the gas intake device and the flushing device through a pipeline; the other end of the microreactor to be processed is connected with a waste liquid bottle through the pipeline; and the microreactor to be processed is arranged between electrodes of the plasma processing device. The present invention uses the effective reactivity of plasma and active free radicals in an excitation atmosphere to crack micro blockage in a micro channel in a short time. The method of the present invention has high flexibility and strong controllability, and can select plasma electrodes according to blocked regions to crack the blockage in a specific region.

The invention claimed is: 
     
       1. A method for processing a blocked microreactor by using a processing system, wherein the processing system comprises a gas intake device, a flushing device, a microreactor to be processed and a plasma processing device,
 one end of the microreactor to be processed is connected with the gas intake device and the flushing device through a pipeline; 
 an other end of the microreactor to be processed is connected with a waste liquid bottle through the pipeline; 
 the microreactor to be processed is arranged between electrodes of the plasma processing device; 
 a four-way valve is arranged between the microreactor to be processed and the gas intake device; and three valves of the four-way valve are respectively connected with an air cylinder, an oxygen cylinder and an argon cylinder; 
 the gas intake device is also provided with a mass flow control meter for regulating a gas flow; and an opening of the mass flow control meter is 20-50 sccm; 
 the plasma processing device comprises the electrodes, an AC power supply and an oscilloscope, wherein a first quartz sheet and a second quartz sheet are arranged between the electrodes and the microreactor to be processed; 
 the electrodes are stainless steel, copper, zinc or iron electrodes, and have shapes of circular, square, triangular or rectangular; and each of the first quartz sheet and the second quartz sheet has an edge larger than edges of the electrodes by 1-2 cm, and a thickness of 1-3 mm; 
 the processing system also comprises a monitoring device, and the monitoring device comprises a camera and a display; 
 wherein the flushing device comprises an injection pump and a syringe, the syringe is respectively connected with a fourth valve of the four-way valve and the microreactor is connected to a three-way valve; 
 wherein the method comprising the following steps: 
 (1) placing the microreactor to be processed between the electrodes of the plasma processing device, and placing each of the first quartz sheet and the second quartz sheet on an upper side and a lower side of the microreactor to be processed; 
 (2) opening the four-way valve, and adjusting the opening of the mass flow control meter, so that one or more mixed gases in the air cylinder, the oxygen cylinder and the argon cylinder enter the microreactor; 
 (3) turning on the AC power supply and adjusting the oscilloscope, wherein an output power applied by the AC power supply is 1.5-5 W; 
 (4) generating plasma to crack a blockage in the microreactor; 
 (5) online observing the blockage in the microreactor in real time through the camera connected with the display, and turning off the AC power supply when the blockage is cracked; 
 (6) starting the injection pump; collecting the cleaning liquid by the waste liquid bottle; closing the four-way valve and stopping the injection pump after the blockage in the pipeline is completely discharged; 
 wherein the cleaning liquid is water, ethanol or acetone. 
 
     
     
       2. The method according to  claim 1 , wherein the display is a computer.